2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
29 #include <drm/drm_crtc_helper.h>
30 #include <drm/radeon_drm.h>
31 #include "radeon_reg.h"
35 #define RADEON_WAIT_IDLE_TIMEOUT 200
38 * radeon_driver_irq_handler_kms - irq handler for KMS
42 * This is the irq handler for the radeon KMS driver (all asics).
43 * radeon_irq_process is a macro that points to the per-asic
44 * irq handler callback.
46 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
48 struct drm_device *dev = (struct drm_device *) arg;
49 struct radeon_device *rdev = dev->dev_private;
51 return radeon_irq_process(rdev);
55 * Handle hotplug events outside the interrupt handler proper.
58 * radeon_hotplug_work_func - display hotplug work handler
62 * This is the hot plug event work handler (all asics).
63 * The work gets scheduled from the irq handler if there
64 * was a hot plug interrupt. It walks the connector table
65 * and calls the hotplug handler for each one, then sends
66 * a drm hotplug event to alert userspace.
68 static void radeon_hotplug_work_func(struct work_struct *work)
70 struct radeon_device *rdev = container_of(work, struct radeon_device,
72 struct drm_device *dev = rdev->ddev;
73 struct drm_mode_config *mode_config = &dev->mode_config;
74 struct drm_connector *connector;
76 if (mode_config->num_connector) {
77 list_for_each_entry(connector, &mode_config->connector_list, head)
78 radeon_connector_hotplug(connector);
80 /* Just fire off a uevent and let userspace tell us what to do */
81 drm_helper_hpd_irq_event(dev);
85 * radeon_irq_reset_work_func - execute gpu reset
89 * Execute scheduled gpu reset (cayman+).
90 * This function is called when the irq handler
91 * thinks we need a gpu reset.
93 static void radeon_irq_reset_work_func(struct work_struct *work)
95 struct radeon_device *rdev = container_of(work, struct radeon_device,
98 radeon_gpu_reset(rdev);
102 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
104 * @dev: drm dev pointer
106 * Gets the hw ready to enable irqs (all asics).
107 * This function disables all interrupt sources on the GPU.
109 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
111 struct radeon_device *rdev = dev->dev_private;
112 unsigned long irqflags;
115 spin_lock_irqsave(&rdev->irq.lock, irqflags);
116 /* Disable *all* interrupts */
117 for (i = 0; i < RADEON_NUM_RINGS; i++)
118 atomic_set(&rdev->irq.ring_int[i], 0);
119 rdev->irq.dpm_thermal = false;
120 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
121 rdev->irq.hpd[i] = false;
122 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
123 rdev->irq.crtc_vblank_int[i] = false;
124 atomic_set(&rdev->irq.pflip[i], 0);
125 rdev->irq.afmt[i] = false;
127 radeon_irq_set(rdev);
128 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
130 radeon_irq_process(rdev);
134 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
136 * @dev: drm dev pointer
138 * Handles stuff to be done after enabling irqs (all asics).
139 * Returns 0 on success.
141 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
143 dev->max_vblank_count = 0x001fffff;
148 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
150 * @dev: drm dev pointer
152 * This function disables all interrupt sources on the GPU (all asics).
154 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
156 struct radeon_device *rdev = dev->dev_private;
157 unsigned long irqflags;
163 spin_lock_irqsave(&rdev->irq.lock, irqflags);
164 /* Disable *all* interrupts */
165 for (i = 0; i < RADEON_NUM_RINGS; i++)
166 atomic_set(&rdev->irq.ring_int[i], 0);
167 rdev->irq.dpm_thermal = false;
168 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
169 rdev->irq.hpd[i] = false;
170 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
171 rdev->irq.crtc_vblank_int[i] = false;
172 atomic_set(&rdev->irq.pflip[i], 0);
173 rdev->irq.afmt[i] = false;
175 radeon_irq_set(rdev);
176 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
180 * radeon_msi_ok - asic specific msi checks
182 * @rdev: radeon device pointer
184 * Handles asic specific MSI checks to determine if
185 * MSIs should be enabled on a particular chip (all asics).
186 * Returns true if MSIs should be enabled, false if MSIs
187 * should not be enabled.
189 static bool radeon_msi_ok(struct radeon_device *rdev)
191 /* RV370/RV380 was first asic with MSI support */
192 if (rdev->family < CHIP_RV380)
195 /* MSIs don't work on AGP */
196 if (rdev->flags & RADEON_IS_AGP)
202 else if (radeon_msi == 0)
206 /* HP RS690 only seems to work with MSIs. */
207 if ((rdev->pdev->device == 0x791f) &&
208 (rdev->pdev->subsystem_vendor == 0x103c) &&
209 (rdev->pdev->subsystem_device == 0x30c2))
212 /* Dell RS690 only seems to work with MSIs. */
213 if ((rdev->pdev->device == 0x791f) &&
214 (rdev->pdev->subsystem_vendor == 0x1028) &&
215 (rdev->pdev->subsystem_device == 0x01fc))
218 /* Dell RS690 only seems to work with MSIs. */
219 if ((rdev->pdev->device == 0x791f) &&
220 (rdev->pdev->subsystem_vendor == 0x1028) &&
221 (rdev->pdev->subsystem_device == 0x01fd))
224 /* Gateway RS690 only seems to work with MSIs. */
225 if ((rdev->pdev->device == 0x791f) &&
226 (rdev->pdev->subsystem_vendor == 0x107b) &&
227 (rdev->pdev->subsystem_device == 0x0185))
230 /* try and enable MSIs by default on all RS690s */
231 if (rdev->family == CHIP_RS690)
234 /* RV515 seems to have MSI issues where it loses
235 * MSI rearms occasionally. This leads to lockups and freezes.
236 * disable it by default.
238 if (rdev->family == CHIP_RV515)
240 if (rdev->flags & RADEON_IS_IGP) {
241 /* APUs work fine with MSIs */
242 if (rdev->family >= CHIP_PALM)
244 /* lots of IGPs have problems with MSIs */
252 * radeon_irq_kms_init - init driver interrupt info
254 * @rdev: radeon device pointer
256 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
257 * Returns 0 for success, error for failure.
259 int radeon_irq_kms_init(struct radeon_device *rdev)
263 spin_lock_init(&rdev->irq.lock);
264 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
269 rdev->msi_enabled = 0;
271 if (radeon_msi_ok(rdev)) {
272 int ret = pci_enable_msi(rdev->pdev);
274 rdev->msi_enabled = 1;
275 dev_info(rdev->dev, "radeon: using MSI.\n");
278 rdev->irq.installed = true;
279 r = drm_irq_install(rdev->ddev);
281 rdev->irq.installed = false;
285 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
286 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
287 INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func);
289 DRM_INFO("radeon: irq initialized.\n");
294 * radeon_irq_kms_fini - tear down driver interrupt info
296 * @rdev: radeon device pointer
298 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
300 void radeon_irq_kms_fini(struct radeon_device *rdev)
302 drm_vblank_cleanup(rdev->ddev);
303 if (rdev->irq.installed) {
304 drm_irq_uninstall(rdev->ddev);
305 rdev->irq.installed = false;
306 if (rdev->msi_enabled)
307 pci_disable_msi(rdev->pdev);
308 flush_work(&rdev->hotplug_work);
313 * radeon_irq_kms_sw_irq_get - enable software interrupt
315 * @rdev: radeon device pointer
316 * @ring: ring whose interrupt you want to enable
318 * Enables the software interrupt for a specific ring (all asics).
319 * The software interrupt is generally used to signal a fence on
322 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
324 unsigned long irqflags;
326 if (!rdev->ddev->irq_enabled)
329 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
330 spin_lock_irqsave(&rdev->irq.lock, irqflags);
331 radeon_irq_set(rdev);
332 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
337 * radeon_irq_kms_sw_irq_put - disable software interrupt
339 * @rdev: radeon device pointer
340 * @ring: ring whose interrupt you want to disable
342 * Disables the software interrupt for a specific ring (all asics).
343 * The software interrupt is generally used to signal a fence on
346 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
348 unsigned long irqflags;
350 if (!rdev->ddev->irq_enabled)
353 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
354 spin_lock_irqsave(&rdev->irq.lock, irqflags);
355 radeon_irq_set(rdev);
356 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
361 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
363 * @rdev: radeon device pointer
364 * @crtc: crtc whose interrupt you want to enable
366 * Enables the pageflip interrupt for a specific crtc (all asics).
367 * For pageflips we use the vblank interrupt source.
369 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
371 unsigned long irqflags;
373 if (crtc < 0 || crtc >= rdev->num_crtc)
376 if (!rdev->ddev->irq_enabled)
379 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
380 spin_lock_irqsave(&rdev->irq.lock, irqflags);
381 radeon_irq_set(rdev);
382 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
387 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
389 * @rdev: radeon device pointer
390 * @crtc: crtc whose interrupt you want to disable
392 * Disables the pageflip interrupt for a specific crtc (all asics).
393 * For pageflips we use the vblank interrupt source.
395 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
397 unsigned long irqflags;
399 if (crtc < 0 || crtc >= rdev->num_crtc)
402 if (!rdev->ddev->irq_enabled)
405 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
406 spin_lock_irqsave(&rdev->irq.lock, irqflags);
407 radeon_irq_set(rdev);
408 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
413 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
415 * @rdev: radeon device pointer
416 * @block: afmt block whose interrupt you want to enable
418 * Enables the afmt change interrupt for a specific afmt block (all asics).
420 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
422 unsigned long irqflags;
424 if (!rdev->ddev->irq_enabled)
427 spin_lock_irqsave(&rdev->irq.lock, irqflags);
428 rdev->irq.afmt[block] = true;
429 radeon_irq_set(rdev);
430 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
435 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
437 * @rdev: radeon device pointer
438 * @block: afmt block whose interrupt you want to disable
440 * Disables the afmt change interrupt for a specific afmt block (all asics).
442 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
444 unsigned long irqflags;
446 if (!rdev->ddev->irq_enabled)
449 spin_lock_irqsave(&rdev->irq.lock, irqflags);
450 rdev->irq.afmt[block] = false;
451 radeon_irq_set(rdev);
452 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
456 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
458 * @rdev: radeon device pointer
459 * @hpd_mask: mask of hpd pins you want to enable.
461 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
463 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
465 unsigned long irqflags;
468 if (!rdev->ddev->irq_enabled)
471 spin_lock_irqsave(&rdev->irq.lock, irqflags);
472 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
473 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
474 radeon_irq_set(rdev);
475 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
479 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
481 * @rdev: radeon device pointer
482 * @hpd_mask: mask of hpd pins you want to disable.
484 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
486 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
488 unsigned long irqflags;
491 if (!rdev->ddev->irq_enabled)
494 spin_lock_irqsave(&rdev->irq.lock, irqflags);
495 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
496 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
497 radeon_irq_set(rdev);
498 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);